{"id":80395,"date":"2024-10-17T18:43:54","date_gmt":"2024-10-17T18:43:54","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/ieee-c37-20-1-1987\/"},"modified":"2024-10-24T19:43:23","modified_gmt":"2024-10-24T19:43:23","slug":"ieee-c37-20-1-1987","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/ieee\/ieee-c37-20-1-1987\/","title":{"rendered":"IEEE C37.20.1 1987"},"content":{"rendered":"

New IEEE Standard – Inactive – Superseded. Low-voltage metal-enclosed switchgear, which can contain either stationary or drawout, manually or electrically operated low-voltage AC or DC power circuit breakers in individual grounded metal compartments, in three-pole, two-pole, or single-pole construction is covered. Rated maximum voltage levels can be 254 V, 508 V, or 635 Vac and 300\/325 V, 800 V, 1000 V, 1600 V, or 3200 Vdc. The continuous current ratings of the main bus in ac designs can be 1600 Al 2000 A, 2500 A, 4000 A, 6000 A, 8000 A, 10,000 A, or 12,000 A. The switchgear can also contain associated control, instruments, metering, protective, and regulating devices as necessary. The standard deals with service conditions, ratings, temperature limitations, and classification of insulating materials, insulation (dielectric) withstand voltage requirements, test procedures, and application.<\/p>\n

PDF Catalog<\/h4>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
10<\/td>\nScope and References
1.1 Scope
1.2 References <\/td>\n<\/tr>\n
11<\/td>\nDefinitions
2.1 Types of Switchgear Assemblies <\/td>\n<\/tr>\n
12<\/td>\n2.2 Qualifying Terms
2.3 Common or Related Terms <\/td>\n<\/tr>\n
13<\/td>\nService Conditions
Ratings
4.1 General <\/td>\n<\/tr>\n
14<\/td>\n4.2 Voltage and Insulation Levels
4.3 Rated Frequency
4.4 Rated Current
Voltage and Insulation Levels AC LV Switchgear
Voltage and Insulation Levels DC LV Switchgear <\/td>\n<\/tr>\n
15<\/td>\n4.5 Temperature Limitations
Switchgear Assemblies <\/td>\n<\/tr>\n
16<\/td>\n4.6 Current Transformer Ratings
4.7 Current Transformer Accuracies
Switchgear Assemblies <\/td>\n<\/tr>\n
17<\/td>\nTests
General
Design Tests
5.2.1 Dielectric Tests
LV Switchgear <\/td>\n<\/tr>\n
18<\/td>\n5.2.2 Rated Continuous Current Tests
5.2.3 Short-Time Current Withstand Tests <\/td>\n<\/tr>\n
19<\/td>\n5.2.4 Short-circuit Current Withstand Test
Copper Conductors for Use in Continuous Current Tests
Copper Conductors for Use in Continuous Current Tests <\/td>\n<\/tr>\n
20<\/td>\n5.2.5 Mechanical Endurance Tests
5.2.6 Flame Resistance Tests
5.2.7 Rod Entry Test
5.2.8 Paint Qualification Test <\/td>\n<\/tr>\n
21<\/td>\nRain Test for Outdoor LV Switchgear
Production Tests
5.3.1 Dielectric Tests <\/td>\n<\/tr>\n
22<\/td>\n5.3.2 Mechanical Operation Tests
Grounding of Instrument Transformer Case Test
Electrical Operation and Control-Wiring Tests
Conformance Tests
Field Dielectric Tests
Construction
6.1 General Requirements
Buses and Primary Connections <\/td>\n<\/tr>\n
23<\/td>\n6.1.2 Grounding
Control and Secondary Circuits and Devices <\/td>\n<\/tr>\n
25<\/td>\n6.1.4 Miscellaneous
Control Power Transformer ShortCircuit Protection <\/td>\n<\/tr>\n
26<\/td>\n6.2 Materials and Finish
6.3 Barriers
6.4 Buses and Connections
6.5 Access Doors and Covers
Closing and Tripping
Indoor LV Switchgear <\/td>\n<\/tr>\n
27<\/td>\nOutdoor LV Switchgear
6.9 Pull Box
6.10 Arrangements with Stationary Circuit Breakers
6.11 Arrangements with Drawout Circuit Breakers <\/td>\n<\/tr>\n
28<\/td>\n6.12 Padlocking
6.13 Primary Cable Space
6.14 Precautionary Labels
6.15 Handling Devices
7 Application Guide for LV Switchgear
Unusual Service Conditions
Minimum Areas for Multiple Cable Connections <\/td>\n<\/tr>\n
29<\/td>\n7.1.1 Ambient Air Temperature Above 40 “C
7.1.2 Ambient Air Temperature Below – 30 “C
7.1.3 Application at Unusual Altitudes
7.1.4 Modification of Equipment for Unusual Environment
Altitude Correction Factors <\/td>\n<\/tr>\n
31<\/td>\nSystem Characteristics-Voltage and Frequency
Overvoltage Considerations-Insulation Levels
Continuous Current Rating and Overload Capability <\/td>\n<\/tr>\n
32<\/td>\nShort-circuit Considerations
Nuclear Power Plant Application
Associated Devices Often Used In LV Switchgear
Circuit-Breaker Loads <\/td>\n<\/tr>\n
33<\/td>\nCircuit Protective Equipment
Overcurrent Protection
8 Guide for Handling Storage and Installation
8.1 General <\/td>\n<\/tr>\n
34<\/td>\n8.2 Handling <\/td>\n<\/tr>\n
35<\/td>\n8.3 Preoperation Check
8.4 Removable Elements
8.5 Interlocks
8.6 Energization
9 Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

IEEE Standard for Metal-Enclosed Low-Voltage Power Circuit-Breaker Switchgear<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
IEEE<\/b><\/a><\/td>\n1987<\/td>\n36<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":80396,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2644],"product_tag":[],"class_list":{"0":"post-80395","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-ieee","8":"first","9":"instock","10":"sold-individually","11":"shipping-taxable","12":"purchasable","13":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/80395","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/80396"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=80395"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=80395"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=80395"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}